Bug Description

Currently, bootstrap.sh downloads a very old MySQL 5.5 release (5.5.6) to test innodb55. For this version the test for bug #722638 fails in the innodb55 configuration (i.e. when testing xtrabackup_innodb55). When tested against the latest release (5.5.16 at the moment) the test passes.

So something has been changed between MySQL 5.5.6 and MySQL 5.5.16 that breaks the test. We should modify bootstrap.sh to use a newer version for testing.

We should also document that the fix for bug #722638 may not work for old MySQL or Percona Server releases. If this limitation proves to be problematic, we may invest more time into fixing it.